Operating systems

myPatterns is a lightweight library implementing pattern matching of arbitrary data structures (not just strings) in concrete syntax notations. Default notations such as JSON are pre-defined, but users can override them with new, customized notations for their data. myPatterns is available for C and JavaScript developers, and has already been integrated with querying tools such as JSLINQ and JSONQuery.

asq is simple implementation of a LINQ-inspired API for Python which operates over Python iterables, including a parallel version implemented in terms of the Python standard library multiprocessing module. The API sports feature equivalence with LINQ for objects, 100% statement test coverage and comprehensive documentation.
asq provides a fluent interface making extensive use of method chaining to create complex queries without compromising readability.
asq works with Python 2.6 and higher, including Python 3. It has been tested on Python 2.6, Python 2.7, Python 3.1 and Python 3.2. It is also tested on IronPython 2.6 and IronPython 2.7.

Catharsis.NET.Repository is a library that provides an abstraction over persistent data storages by introducing common repository pattern interfaces over popular ORM frameworks (NHibernate, Entity Framework, LINQ2SQL).